頻率偏移頻移 的英文怎麼說

中文拼音 [bīnlǜpiānyíbīnyí]
頻率偏移頻移 英文
frequency shift
  • 頻 : Ⅰ形容詞（次數多） frequent Ⅱ副詞（屢次） frequently; repeatedly Ⅲ名詞1 [物理學] （物體每秒鐘振動...
  • 率 : 率名詞（比值） rate; ratio; proportion
  • 偏 : Ⅰ形容詞1 （不正; 歪斜） inclined to one side; slanting; leaning 2 （只側重一面） partial; prejudi...
  • 移 : Ⅰ動詞1. （移動） move; remove; shift 2. （改變; 變動） change; alter Ⅱ名詞（姓氏） a surname
  • 頻率 : frequency; rate
  1. According to iec ' s standards involved, voltage fluctuation and flicker become a index of power quality. but the research in those aspects such as harmonic frequency excursion and ect

    然而，人們對于電能質量中諸如諧波、頻率偏移等方面的研究相對電壓波動和閃變來說要多得多，研究得也較成熟。
  2. Finally, an example of simulation system is presented, and the influence of frequency excursion on performance of multi - tone continuous wave jamming is analyzed and simulated

    最後，給出了模擬系統實例，分析並模擬了頻率偏移對多頻連續波干擾性能的影響。
  3. Synchronization is very important for mimo - ofdm system because it is very sensitive to time and frequency offset

    Mimo - ofdm對時間和頻率偏移非常敏感，因此mimo - ofdm同步顯得尤為重要。
  4. In the synchronous techniques based pilot symbols, here propose a frequency offset estimating arithmetic using discrete pilot symbols. we pick up integer times sub - carrier frequency offset from the same ofdm symbol and estimate exact

    此外，在頻偏估計方面，推導出短訓練序列前後兩段時域符號間的關系，並利用此進行粗頻偏估計，使頻率偏移的估計范圍大大增加。
  5. The shift in frequency from transmitted waves gives the velocity of the eddies, which move along with the wind

    電波經反射后的頻率偏移，可測定小渦旋的移動，亦即是風向和風速。
  6. Theoretical model of self - mixing interference in a linear frequency modulated laserdiode is presented by using the dynamic theory of semiconductor laser with weak external optical feedback. the characteristics of oscillation frequency shift and output power changes of the laser diode are analyzed by using the theoretical model. the absolute distance from front facet of laser diode to target can be found by measuring spectrum of output power of the laser diode

    使用半導體激光器在弱反饋條件下的動力學理論，建立了線性調頻半導體激光器的自混頻干涉理論模型.基於該模型，分析了激光器振蕩頻率偏移與輸出功率變化特性.通過測量激光器輸出功率譜，可以得到激光器前端面與被測目標之間的距離
  7. Estimation of the reservoir permeability using the frequency offset and time lag of stoneley wave

    利用斯通利波的頻率偏移和時間延遲判斷儲層滲透性
  8. In the traditional polarization diversity and combining scheme, differential mode loop and common mode loop is combined to lock in the phase and frequency of the diversity signals and remove the carrier frequency bias and doppler shift

    傳統的極化分集接收方案是將差模環和共模環相結合完成兩路信號的同頻同相鎖定以及多普勒頻率偏移的去除。
  9. In chapter 5, the complex envelop simulation block diagrams of fh transmitter and receiver are presented at first. then key techniques of simulation system are discussed, including frame processing structure, fh sequence generator, etc. finally, simulation models of fh transmitter, receiver and jammer are presented. the influence of frequency excursion on performance of multi - tone continuous wave jamming is analyzed

    第五章首先設計了跳頻發信機成員和接收機成員的復包絡模擬框圖;其次討論了跳頻模擬系統實現的關鍵技術，包括幀處理結構、跳頻序列發生器等;最後給出了跳頻通信發信機、接收機以及干擾機成員的模擬模型，分析了頻率偏移對多頻連續波干擾性能的影響。
  10. Such problems as the attenuation of dc elements and sine waveform, voltage sag and frequency deviation should be taken into account in order to analyze the transient process in the power system

    要分析電網的暫態特性，還必須考慮衰減直流分量和衰減正弦波，以及電壓缺口和頻率偏移等問題。
  11. It presents the mathematical models for the ppm modulation and demodulation circuits system. author gives out the conditions of linear modulation and demodulation, and educes its connection between the modulation factor and maximal laser frequency excursion

    建立了ppm調制與解調的數學模型，給出了實現線性調制與解調的條件以及調制深度與最大激光頻率偏移之間的關系。
  12. A pilot subcarrier - based joint frequency offset correction and channel estimation method for ofdm systems

    系統中一種基於導頻子載波的聯合頻率偏移糾正和通道估計方法
  13. However, compared with voltage deviation, unbalance of three phases, harmonics and frequency deviation, fluctuation and flicker are more complex to be detected, its research is relative to scarce, and the measuring devices are much less. hence, some further research on measuring voltage fluctuation and flicker has been done in the paper

    但與電壓偏差、三相不平衡、諧波、頻率偏移等電能質量問題相比，電壓波動與閃變的檢測較為復雜，研究相對不足，測量設備較少，因此，本文選擇這一問題進行進一步研究。
  14. However, it also has two main disadvantages, i. e., high sensitivity to nonlinear problems and synchronization errors

    但ofdm技術存在著兩個主要缺點：對非線性問題敏感，對定時和頻率偏移敏感。
  15. Timing recovery and frequency offset estimation for ofdm system

    系統定時與頻率偏移估計
  16. We proposed a new time acquisition method, called adaptive subsection correlation time acquisition method of mc - cdma system, the subsection correlation length is adapted according to the probable frequency offset

    提出了用於mc - cdma系統的新型時間同步法一自適應分段相關時間同步法。它根據估計頻率偏移自適應調整分段相關長度。
  17. Simulating shows, that the application of this new method can detect fundamental components effectively and quickly, and can eliminate the influence of frequency shift

    模擬證明，該方法能夠迅速準確的提取基頻分量，並且具有能夠克服系統頻率偏移影響的優點。
  18. The method has perfect effect on calculating the voltage swell and sag, voltage notch and frequency deviation. numerous simulations also prove the effectiveness of the method

    對于電壓驟升驟降、電壓缺口以及頻率偏移，該計算方法也有很好的效果，大量的模擬結果證明了這一點。
  19. Firstly, in wireless environment, receiver has no know the time delay between transmitter and itself. in ofdm system, ofdm data is transmitted as one symbol, so in order for correct demodulation, the correct start of symbol should be got from ofdm system to reduce the effect of isi. secondly, the high frequency utilization in ofdm is based on the orthogonal properties of sub carriers. if frequency offset is generated, the orthogonal properties among sub carriers will lost, that will cause inter carrier interference ( ici ) and high ber of system

    Ofdm技術也存在著一些缺陷，首先，在無線環境中傳輸的ofdm信號對定時要求高，為了減少碼間串擾（ isi ）影響，必須從接收信號中提取出正確的符號起始位;其次， ofdm系統對頻率偏移敏感， ofdm技術的高頻譜利用率和傳輸可靠性均以子載波的正交性為基礎，如果接收機和發射機之間發生頻率偏移，子載波之間就會失去正交性，導致嚴重的子載波間干擾（ ici ） ，降低系統性能。
  20. Then synchronization is significant to b3g system. during the national “ 863 ” future project, uestc is in charge of the b3g tdd downlink that bases on fpga

    然而， ofdm對頻率偏移非常敏感，因此同步技術也成為b3g系統的關鍵技術之一，備受關注。
分享友人
分享到 Line

分享到臉書